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WIP: IsFFEMatrix, IsFFEMatrixGroup etc. for MatrixObj #6089

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WIP: IsFFEMatrix, IsFFEMatrixGroup etc. for MatrixObj #6089

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99643f4
Make IsMatrixGroup and IsFFEMatrixGroup more flexible
fingolfin Sep 3, 2025
ca722b5
Add a bunch of new filters for FFE and cylotomic matrices
fingolfin Sep 3, 2025
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3 changes: 2 additions & 1 deletion lib/grpffmat.gd
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,8 @@
## </ManSection>
## <#/GAPDoc>
##
DeclareSynonym( "IsFFEMatrixGroup", IsFFECollCollColl and IsMatrixGroup );
DeclareCategory( "IsFFEMatrixGroup", IsMatrixGroup );
InstallTrueMethod( IsFFEMatrixGroup, IsFFECollCollColl and IsMatrixGroup );


#############################################################################
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3 changes: 2 additions & 1 deletion lib/grpmat.gd
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Expand Up @@ -26,7 +26,8 @@
## </ManSection>
## <#/GAPDoc>
##
DeclareSynonym( "IsMatrixGroup", IsRingElementCollCollColl and IsGroup );
DeclareCategory( "IsMatrixGroup", IsGroup );
InstallTrueMethod( IsMatrixGroup, IsRingElementCollCollColl and IsGroup );

#############################################################################
##
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30 changes: 30 additions & 0 deletions lib/matobj1.gd
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Expand Up @@ -263,6 +263,36 @@ DeclareCategory( "IsMatrixObj", IsMatrixOrMatrixObj );
DeclareCategory( "IsRowListMatrix", IsMatrixObj );



#############################################################################
##
# Two filters to speed up some methods:
DeclareFilter( "IsIntVector" ); # TODO: replace this legacy filter from matobjplist.gi with something better
DeclareFilter( "IsFFEVector" );

DeclareCategory( "IsFFEVectorObj", IsVectorObj );
DeclareCategory( "IsCyclotomicVectorObj", IsVectorObj );

DeclareCategory( "IsFFEMatrixOrMatrixObj", IsMatrixOrMatrixObj );
# DeclareSynonym( "IsFFEMatrix", IsFFEMatrixOrMatrixObj and IsMatrix );
# DeclareSynonym( "IsFFEMatrixObj", IsFFEMatrixOrMatrixObj and IsMatrixObj );
# or maybe
# DeclareProperty( "IsFFEMatrix", IsMatrix );
# DeclareProperty( "IsFFEMatrixObj", IsMatrixObj );

DeclareCategory( "IsCyclotomicMatrixOrMatrixObj", IsMatrixOrMatrixObj );
# DeclareSynonym( "IsCyclotomicMatrix", IsCyclotomicMatrixOrMatrixObj and IsMatrix );
# DeclareSynonym( "IsCyclotomicMatrixObj", IsCyclotomicMatrixOrMatrixObj and IsMatrixObj );
# or maybe have them be properties with methods so users are not confused ?!?
# DeclareProperty( "IsCyclotomicMatrix", IsMatrix );
# DeclareProperty( "IsCyclotomicMatrixObj", IsMatrixObj );


InstallTrueMethod( IsFFEMatrixOrMatrixObj, IsFFECollColl and IsMatrix );
InstallTrueMethod( IsCyclotomicMatrixOrMatrixObj, IsCyclotomicCollColl and IsMatrix );



#############################################################################
##
#A BaseDomain( <vector> )
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4 changes: 0 additions & 4 deletions lib/matobjplist.gd
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Expand Up @@ -122,7 +122,3 @@ BindGlobal( "ROWSPOS", 4 );
#BindGlobal( "BDPOS", 1 ); # see above
BindGlobal( "ELSPOS", 2 );

# Two filters to speed up some methods:
DeclareFilter( "IsIntVector" );
DeclareFilter( "IsFFEVector" );

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